Comparison

iMolview vs ReactionFlash

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

iMolview

Explore biological molecules in 3D. View proteins, DNA, and drug structures from major databases. Customize representations, select specific elements, and analyze molecular interactions. Sync your own files and save scenes for later.

Highlights
  • 3D molecular visualization
  • Browse PDB, DrugBank, Pubchem
  • Customizable representations
  • Individual element coloring
  • Neighbor analysis
  • Electron density map contouring
  • Scene saving and management
Features
Read full description

Explore the fascinating world of biological macromolecules: iMolview lets you browse and view in 3D protein and DNA structures from Protein Data Bank, drug molecules from DrugBank, and small molecules from Pubchem. Search for drug names like 'ibuprofen' or 'gefitinib' in DrugBank, or proteins like 'insulin' or 'thyroid receptor' in PDB. Information associated with each molecule in these databases is also at your fingertips. Sync and view your own structure files via iTunes. Molecular view can be customized with a rich set of molecular representations (wires, balls-and-sticks, space filling, ribbon diagrams, molecular surfaces) and various coloring schemes. Select residues, atoms or chains and color or change their representations individually. Select 'neighbors' of a ligand or any other selection to identify interacting atoms or residues. Set 'inertia' to the maximum and let your molecule spin in 3D indefinitely. Save the current scene (viewpoint + representation) as a slide which can be easily accessed later. Save the whole molecular document with multiple slides. Load and contour electron density map

About

ReactionFlash

This app serves as a comprehensive flashcard-style learning tool for named chemical reactions. It provides detailed information on reaction mechanisms and examples from scientific literature, with a quiz mode to test user knowledge.

Highlights
  • Learn named chemical reactions
  • Understand reaction mechanisms
  • View literature examples
  • Quiz mode for knowledge testing
  • Flashcard interface
Features
Read full description

Want to refresh your memory on named chemical reactions before an exam or a group meeting? Get all the details with ReactionFlash(R) as a great way to learn named reactions, understand their mechanisms and view examples published in peer-reviewed literature. Designed and developed in consultation with Professor Dr. Erick M. Carreira of ETH Zürich, the app covers 1'266 named chemical reactions, by far the largest collection of Named Reactions. Professor Carreira has helped ensure that we have all the fundamental reactions that should be part of every chemist’s toolkit: from the best-known ones to the ones only Nobel Prize winners remember! The app is designed like a set of flash cards so it can be used as a learning tool as well as a reference. Each ‘card’ shows the reaction, its mechanism and examples from peer-reviewed, published literature. It also has a quiz mode that lets you test your knowledge. Linking into Reaxys enables you to find the most recent examples of each reaction, many with experimental details. Reaxys delivers experimental facts from the literature, enabling researchers to find the best synthetic routes and conditions. Find out more at https://www.elsevier.com/solutions/reaxys Download the app now and see if you know all the named reactions! Summary: - Learn named reactions - Review and understand mechanisms - Explore examples published in peer-reviewed literature - Take the ReactionFlash quiz and see how much you know If you need support, please contact us at reactionflash@elsevier.com. Reaxys and ReactionFlash are trade marks of Elsevier Limited, used under license.

Screenshots

iMolview1 screens
ReactionFlash4 screens

Verdict

The call

The clearest difference is price: ReactionFlash at Free against iMolview's $0.99. ReactionFlash also leads on rating (4.8 vs 3.6) and ratings volume (41 vs 13). iMolview's advantage is update cadence (every 2 months vs every 4 months) and iOS requirement (12.0 vs 14.0). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

ReactionFlash is free to download; iMolview costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ReactionFlash holds the better App Store score, 4.8 against 3.6. Both are backed by a comparable volume of ratings — 13 and 41 respectively. Written reviews point the same way: 78% of iMolview's written reviews are positive against 81% of ReactionFlash's.

UpkeepUpdate frequency

iMolview ships an update every 2 months, ReactionFlash every 4 months. The most recent releases landed on September 22, 2026 and September 21, 2026 respectively.

Scorecard5 real differences · 5 level
iMolview versus ReactionFlash: the parameters behind the verdict, then further details
ParameteriMolviewReactionFlash
Price$0.99Free — better
Rating3.6 (13 ratings)4.8 (41 ratings) — better
Positive reviews78.1% of reviews80.6% of reviews — better
Number of ratings1341 — better
Update frequencyEvery 2 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better14.0
Further details — not scored
Size55 MB37 MB
Age rating4+4+
DeveloperMolsoftElsevier Limited

Customer experience

iMolview

All ratings13 ratings
Positive61.5%
Neutral7.7%
Negative30.8%
Written reviews32 reviews
Positive78.1%
Neutral3.1%
Negative18.8%

ReactionFlash

All ratings41 ratings
Positive95.1%
Neutral2.4%
Negative2.4%
Written reviews31 reviews
Positive80.6%
Neutral6.5%
Negative12.9%

In-app purchases

None

iMolview

No in-app purchases

None

ReactionFlash

No in-app purchases

Questions

Is iMolview free?
iMolview costs $0.99, with no in-app purchases.
Is ReactionFlash free?
ReactionFlash is free to download, with no in-app purchases.
Which has better reviews, iMolview or ReactionFlash?
ReactionFlash is rated higher. iMolview averages 3.6 out of 5 from 13 ratings, while ReactionFlash averages 4.8 from 41 ratings.
Do iMolview or ReactionFlash have ads?
Neither iMolview nor ReactionFlash shows ads.
Which is updated more often, iMolview or ReactionFlash?
iMolview ships an update every 2 months, and ReactionFlash every 4 months. Most recently, iMolview was updated on September 22, 2026 and ReactionFlash on September 21, 2026.

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